NEWELL/WHITE Families,Harrison & Monroe Co.,OH.,1840>

My cousin Ann is researching her husband's family.James Newell married Sarah White on 15 Jan.1840 in Harrison Co.,OH.. They moved to Monroe Co.,OH. & appear in the 1850,60,70 & 80 census there.Sarah Newell died in 1881 but they don't know where. Also,they don't know where or when James Newell died.Ann needs proof of James & Sarah's parents too. There was a James White who lived next door to John Newell, in Athens Twp., in the 1840 Harrison Co.,OH. census. Could these men be James & Sarah's fathers?